Opened only by the ⚙ button in the toolbar. No keyboard shortcut, no menu-bar item. Closed with × or by clicking the backdrop.
Understand the shape of it: there are no ordinary preferences in Settings. It is status readouts and action buttons. Theme and playback live in the toolbar instead.
Engines. Four status rows: ytdlp, ffmpeg, gallerydl, recognise (version / ok / missing), showing Checking… for the first few seconds. There is no update button here for any of them, and the note says why in four words: "Tools update with the app." There used to be one, for yt-dlp; it was removed on purpose (section 8).
Stability. Restart engine and Open logs.
App. The app version; a check for updates button; a Videos row with the background queue's status (Downloading videos — N left / All videos downloaded / Paused — log in to Instagram… / Paused — Instagram asked us to slow down; resuming in N min); Port; Data (the path).
Library. Auto-backup and the four backup buttons (section 13).
Account. Instagram (section 14).
Sync. Cloud sync does not exist in shipped builds. Every /api/sync/* endpoint answers 404 sync is disabled, and there is nothing to reach in the interface.
Something here wrong, or something missing? Tell us — the manual is corrected against the app, not the other way round.